import router from './router';
import store from './store';
import { Message } from 'element-ui';
import NProgress from 'nprogress'; // progress bar
import 'nprogress/nprogress.css'; // progress bar style
import { getToken } from '@/utils/auth'; // get token from cookie

NProgress.configure({ showSpinner: false }); // NProgress Configuration

// permission judge function
function hasPermission(accessList, permissionAccess) {
  if (!permissionAccess) return true;
  return accessList.some(access => permissionAccess.indexOf(access) >= 0);
}

const whiteList = ['/login', '/auth-redirect']; // no redirect whitelist

router.beforeEach((to, from, next) => {
  NProgress.start(); // start progress bar
  if (getToken()) {
    // determine if there has token

    /* has token*/
    if (to.path === '/login') {
      next({ path: '/' });
      NProgress.done(); // if current page is dashboard will not trigger	afterEach hook, so manually handle it
    } else {
      if (store.getters.roles.length === 0) {
        // 判断当前用户是否已拉取完user_info信息
        store
          .dispatch('GetUserInfo')
          .then(res => {
            // 拉取user_info
            const result = res.data;
            const accessList = result.data.userInfo.accessList; // note: roles must be a object array! such as: [{id: '1', name: 'editor'}, {id: '2', name: 'developer'}]
            store.dispatch('GenerateRoutes', { accessList }).then(accessRoutes => {
              // 根据roles权限生成可访问的路由表
              router.addRoutes(accessRoutes); // 动态添加可访问路由表
              next({ ...to, replace: true }); // hack方法 确保addRoutes已完成 ,set the replace: true so the navigation will not leave a history record
            });
          })
          .catch(err => {
            store.dispatch('FedLogOut').then(() => {
              Message.error(err);
              next({ path: '/' });
            });
          });
      } else {
        // 没有动态改变权限的需求可直接next() 删除下方权限判断 ↓
        if (hasPermission(store.getters.accessList, to.meta.access)) {
          next();
        } else {
          next({ path: '/401', replace: true, query: { noGoBack: true }});
        }
        // 可删 ↑
      }
    }
  } else {
    /* has no token*/
    if (whiteList.indexOf(to.path) !== -1) {
      // 在免登录白名单，直接进入
      next();
    } else {
      next(`/login?redirect=${to.path}`); // 否则全部重定向到登录页
      NProgress.done(); // if current page is login will not trigger afterEach hook, so manually handle it
    }
  }
});

router.afterEach(() => {
  NProgress.done(); // finish progress bar
});
